CN107414934A - A kind of online ring type shearing device - Google Patents

Abstract

The invention relates to the field of online automatic material cutting, in particular to an online ring cutting device. The device includes a base, a carriage trolley, a clamping mechanism, a cutting mechanism, a moving bracket, a cutting mechanism and a pneumatic control part. The material on the production line is cut off at a fixed length online; when the material touches the contact of the travel switch, the trolley moves synchronously with the material; the crank-slider mechanism drives the collet to clamp the material; the internal and external meshing of the gear makes the transmission shaft rotate forward and reverse , The transmission mechanism makes the tool rotate and feed and retreat in the radial direction. After the material is removed, the clamping device is released, and the trolley returns, ready for the next cycle. The invention adopts a pneumatic sequence control method and realizes mechanical interlocking at the same time; the parts in contact with materials are made of antistatic materials, and the device shell is stably connected with the grounding body; it is safe and reliable, and is suitable for online fixed-length cutting of flammable and explosive products.

Description

An online ring type cutting device

technical field

The invention relates to the field of online automatic cutting of materials, in particular to an online ring type cutting device, which is mainly suitable for online cutting of non-metal materials with low hardness, and the cutting surface has better dimensional accuracy and lower surface roughness It can be used in places with special requirements for explosion protection.

Background technique

At present, mechanical cutting devices with a wide range of applications generally use ordinary motors as the power source. The cost of using ordinary motors is lower, and the design is more convenient; in the working environment with explosion-proof requirements, the safety is not high, and explosion-proof motors are usually used instead to protect electrical components against static electricity and reduce the accumulation of static electricity. But this will increase the cost of manufacture, use and maintenance. Although anti-static and other measures have been taken, the occurrence of danger cannot be completely avoided. For the cutting of non-metal soft materials, the "guzzle knife" cutting method is generally used at present. This structure is characterized by simplicity, reliability and easy maintenance. But at the same time, there are disadvantages such as large cutting impact force, "horseshoe-shaped" section during cutting, and poor section roughness, so it is not suitable for online cutting. If the air source is used as the power source, the hazards such as electric sparks that may be caused by the electrical system can be avoided. At present, many factories have built gas stations, which can be used in a unified supply to the production line, which can reduce production costs while meeting safety requirements.

Contents of the invention

The purpose of the invention is to solve the problem of product cutting in the online production process, and provides an online ring type cutting device for this purpose.

The present invention is realized by adopting the following technical solutions: an online loop cutting device, including a base, a sliding frame trolley, a front chuck mechanism, a rear chuck mechanism, a cutter mechanism, a moving bracket and a steering mechanism;

The sliding frame trolley is arranged on the base, and the sliding frame trolley slides on the base through the wheels. The front chuck mechanism and the rear chuck mechanism are arranged on the sliding frame trolley. The front chuck mechanism includes the first Spring collet frame, the first collet frame is provided with a first collet, the first collet is horizontally installed in the first collet, the tail end of the first collet and the upper part of the first shift fork Contact, the first cylinder is fixed outside the first jacket, the piston rod of the first cylinder is connected to the lower part of the first shift fork, and the middle part of the first shift fork is hinged on the first spring chuck base;

The rear collet mechanism includes a second collet frame fixed on the carriage trolley, a second collet is arranged on the second collet frame, a second collet is horizontally installed in the second collet, and the second collet is horizontally installed in the second collet. The tail end of the second spring collet is in contact with the upper part of the second shift fork, the second cylinder is fixed outside the second jacket, the piston rod of the second cylinder is connected with the lower part of the second shift fork, and the middle part of the second shift fork is hinged on the second shift fork. Two collet chuck base;

The cutter mechanism includes a transmission shaft arranged on the second synchronous pulley, one end of the transmission shaft is connected with the first cylindrical gear, the first cylindrical gear meshes with the fixed gear, the other end of the transmission shaft is connected with the second bevel gear, and the second The bevel gear meshes with the first bevel gear, the first bevel gear is arranged on the second lead screw, and the nut on the second lead screw is connected with the cutter;

The steering mechanism includes a second synchronous pulley, the second synchronous pulley is arranged on the first jacket and coaxial with the fixed gear, the second synchronous pulley is connected with the first synchronous belt, and the first synchronous belt is also connected with the third synchronous belt. Pulley connection, the third synchronous pulley is connected coaxially with the second spur gear, the second spur gear meshes with the third spur gear, the third spur gear is coaxially connected with the fourth spur gear, the fourth spur gear is connected with the first not The complete gear and the second incomplete gear form internal meshing and external meshing respectively (the fourth cylindrical gear only meshes with one incomplete gear at the same time, and the two incomplete gears are rigidly connected), the first incomplete gear and the second incomplete gear The complete gear is connected with the first output shaft of the reducer through a one-way bearing;

The mobile bracket includes a third air cylinder fixed on the front end of the carriage trolley through a bracket. The bracket is also provided with a first guide post. The piston rod of the third air cylinder is connected with a bracket that can slide along the first guide post. The fourth cylinder and the fifth cylinder are also fixed, the piston rod of the fourth cylinder is obliquely aimed upward at the bracket, the piston rod of the fifth cylinder is vertically facing the bracket downward, and the front end of the bracket is also provided with a travel switch;

The base is also fixed with two first lead screws arranged in parallel, the nut on the first lead screw is connected with the sliding frame trolley through the connecting rod, the end of the first lead screw is provided with a first synchronous pulley, and the two first synchronous belts The wheels are connected through the second synchronous belt, and one of the synchronous pulleys is connected with the second output shaft of the speed reducer.

The action process of the present invention is as follows. First, the continuously produced materials pass through the second collet and the first collet to the front end of the moving bracket, and trigger the action of the travel switch. The first cylinder and the second cylinder are triggered to clamp the material. The air motor starts to work, the two output shafts of the reducer start to rotate, the high-speed shaft (second output shaft) drives the first screw to rotate, and the sliding frame trolley is driven forward through the screw nut mechanism, and the forward speed is related to the material production speed match. At the same time, the low-speed shaft (first output shaft) of the reducer drives the first incomplete gear and the second incomplete gear to rotate clockwise, and the fourth cylindrical gear first meshes with the first incomplete gear to achieve counterclockwise rotation. The cutter starts to feed radially to cut off the material. After the cutting is completed, the fifth cylinder completes the action of falling and retracting, so that the cut material is completely separated. Then, the moving bracket moves forward under the stretching action of the third cylinder, and after reaching the set stroke, the fourth cylinder stretches out to push the material out of the bracket. During this process, the fourth cylindrical gear is separated from the first incomplete gear and meshed with the second incomplete gear, and the fourth cylindrical gear changes its rotation direction and drives the cutter back. Finally, the first cylinder and the second cylinder retract, the air motor starts to rotate in reverse, and the carriage dolly returns to its original position after starting. So far, complete one action cycle, and wait for the start of the next action signal. The invention can circulate according to the pneumatic circuit, and can also complete each action manually, which is convenient for the automatic operation of the device and the maintenance of the equipment.

The invention is mainly used to cut off products with a certain geometric shape in cross-section: such as PVC pipes, tubular drug forms, etc. This device cuts off the material on the production line at a fixed length online; when the material touches the contact of the travel switch, the trolley moves synchronously with the material; the crank-like slider mechanism drives the spring chuck to clamp the material; In reverse, the transmission mechanism makes the tool rotate and feed and retract in the radial direction. After the material has been removed, the clamping device is released and the trolley returns, ready for the next cycle. The invention adopts a pneumatic sequence control method and realizes mechanical interlocking at the same time; the parts in contact with materials are made of antistatic materials, and the device shell is stably connected to the grounding body; it is safe and reliable, and is suitable for online fixed-length cutting of flammable and explosive products.

Description of drawings

Fig. 1 is a schematic diagram of a three-dimensional entity of the present invention.

Fig. 2 is a schematic diagram of the front view structure of the present invention.

Fig. 3 is a schematic bottom view of the structure of the present invention.

Fig. 4 is a left view structural schematic diagram of the present invention.

Fig. 5 is a front view of the structure of the front chuck assembly.

Fig. 6 is a top view of the structure of the front chuck assembly.

Fig. 7 is a three-dimensional solid schematic diagram of the steering mechanism.

Figure 8 is a front view of the power and steering mechanism driving the cutter.

Fig. 9 is a right view of the power and steering mechanism driving the cutter.

Fig. 10 is a pneumatic principle diagram of the present invention.

In the figure: 1-first cylinder, 2-first shift fork, 3-shift fork nut, 4-second spring collet, 5-second cylinder, 6-second shift fork, 7-sliding frame trolley, 8 -base, 9-first lead screw, 10-third cylinder, 11-first guide post, 12-bracket, 13-fourth cylinder, 14-fifth cylinder, 15 first collet, 16- The first synchronous belt, 17-guide sleeve, 18-second guide post, 19-first incomplete gear, 20-cutter, 21-wheel, 22-first synchronous pulley, 23-transmission seat, 24-the first Two synchronous belts, 25-second synchronous pulley, 26 guide block, 27-fork support rod, 28-first cylindrical gear, 29-nut, 30-second screw, 31-first bevel gear, 32- The second bevel gear, 33-fixed gear, 34-the first jacket, 35-the second cylindrical gear, 36-the third synchronous pulley, 37-the third cylindrical gear, 38-the second incomplete gear, 39-the first Four cylindrical gears, 40-lock nut, 41-air source, 42-air storage tank, 43-pneumatic triple piece, 44-overflow valve, 45-first two two four-way single air control valve, 46-muffler, 47-one-way throttle valve, 48-air motor, 49-the first two two-way three-way machine control valve, 50-the second two-two four-way single air control valve, 51-the third two-two four-way single air control valve Valve, 52-Second 2-position 3-way normally-off mechanical control valve, 53-2-position 2-position normally-off machine-controlled valve, 54-Third 2-position 3-normally-off machine control valve, 55-Fourth 2-position 4-way single air control Valve, 56-the fourth two-position three-way normally-off machine control valve, 57-the fifth two-position four-way single air control valve.

detailed description

The structure of the device is composed of a base 8, a sliding frame trolley 7, a front chuck mechanism, a rear chuck mechanism, a cutter mechanism, a moving bracket, a steering mechanism, and a pneumatic control circuit. The device will be described in detail below through the cutting process of the hollow cylindrical drug form.

As shown in Fig. 1, Fig. 2 and Fig. 3, the base 8 supports the whole device, and the base 8 is a frame structure welded by channel steel. Other components are connected to the base by means of bolt connection. The base makes good contact with the earth through the wires to prevent the accumulation of static electricity. For the continuity of the processing process, the structure of the sliding frame trolley 7 is added, and the sliding frame trolley 7 can move forward and backward on the base through 6 wheels. The first leading screw 9 is connected together with the carriage dolly by bearings.

The front chuck mechanism and the rear chuck mechanism use cylinders to provide power to drive spring chucks to clamp materials. After the clamping action is completed, the cutter mechanism rotates and radially feeds to complete the material cutting operation. The axes of the collets in the front chuck mechanism and the rear chuck mechanism are on the same horizontal line. The first cylinder 1 and the second cylinder 5 are respectively connected with the first shift fork 2 and the second shift fork 6 through hinges.

The cutter mechanism is composed of a group of bevel gears, screw nuts, guide blocks and other parts. The cutter mechanism is connected with the synchronous pulley through bolts, and the two rotate simultaneously. The radial movement of the tool is achieved by transferring the rotational movement of the synchronous pulley to a set of bevel gears for direction conversion through a set of cylindrical gears, and then converting the rotational movement into radial movement through a set of screw and nut mechanisms. The 360° circular cutting method of the tool can reduce the cutting force and improve the roughness of the cut surface.

The moving bracket is driven by a cylinder to move back and forth on the trolley, and limit blocks are installed on both sides of the maximum stroke of the trolley to ensure repeatable movement accuracy. After the cutting is completed, the material is placed on the moving bracket, and the cylinder moves out to completely separate the cut material from the whole. Then the cylinder pushes the cut material to the discharge position on one side. During specific implementation, the third cylinder 10 is fixed on the carriage dolly 7, and the piston rod is connected with the drug-type bracket 12 by a nut. Guided by the first guide post 11, the drug-type bracket 12 can move back and forth on the carriage dolly under the action of the third cylinder 10. The fifth cylinder 14 plays the role of blowing material. The piston rod of the fourth cylinder 13 is connected with a push plate, and after the fifth cylinder 14 action was completed, the push plate released the medicine type from the mobile bracket.

The steering mechanism is composed of a group of gears, shafts and one-way bearings. In order to achieve synchronization and interlocking, the movement of the carriage trolley and the cutting of the tool are driven by an air motor in the present invention. The tool is powered by the synchronous belt, and the feeding and withdrawal of the tool is realized by changing the rotation direction of the synchronous belt. The air motor can obtain two power shafts with different speeds through the double output shaft reducer. The first incomplete gear 19 and the second incomplete gear 38 are connected with the low-speed shaft in the reducer through a one-way bearing, and the two gears are rigidly connected. When the low-speed shaft turns clockwise, the power is transmitted to the two incomplete gears; otherwise, the one-way bearing will run without load when it turns counterclockwise. The cooperation of the cylindrical gear 39 and the two incomplete gears is internal meshing and external meshing respectively. When the two incomplete gears rotated, the cylindrical gear 39 realized the change of the rotation direction by the conversion of the internal and external meshing with the two incomplete gears. Then, the power is transmitted to the synchronous pulley 36 through the gear, so that the direction conversion of the synchronous belt can be realized.

In addition, the guide sleeve 17 is connected to the base through bolts, and the second guide post 18 is connected to the sliding frame. When the carriage trolley moves, the guide sleeve 17 and the second guide post 18 cooperate to play a guiding role.

As shown in Figure 4, it is the left view of the device, in which the power transmission process can be seen. The steering mechanism is connected to the carriage trolley with bolts through the transmission seat 23, the second synchronous belt 24 and the first synchronous pulley 22 on both sides of the carriage trolley form a belt drive, and the first synchronous pulley 22 is connected to the first lead screw 9 , the lead screw nut drives the carriage dolly 7 to move back and forth, and the third synchronous pulley 36 and the second synchronous pulley 25 form a belt transmission through the first synchronous belt 16 .

As shown in FIG. 5 , the cutter mechanism is connected with the second synchronous pulley 25 through a set of bolts. Wherein the centerline of the cutting knife intersects the axis of the first collet 15 perpendicularly. The guide block 26 plays a guiding role when the cutting knife is fed.

FIG. 6 is a top view of the front chuck mechanism. The first collet 34 connects the second synchronous pulley 25 to the first spring chuck frame, and prevents loosening by two locking nuts 40 . The first collet 15 and the collet 34 present a "Y" shape fit. When the two have axial relative movement, the radial dimension of the front end of the first collet 15 decreases or increases, so as to achieve clamping and Loosen the purpose of the drug form. The rear end of the first collet 15 is threadedly connected with the shift fork nut 3 . The lower part of the first shift fork 2 is connected to the piston rod of the first cylinder 1, and the upper part is connected to the bearing. The bearing is in line contact with the first collet 15, and the two are not fixed, and the middle of the first shift fork 2 passes through the shift fork. The support rod 27 and the hinge are connected with the chuck base to form a similar slider crank mechanism. When the piston rod of the first cylinder 1 shrinks, the first shift fork 2 is equivalent to a lever, which drives the first collet 15 to move backward, so that the medicine type can be clamped. The first cylindrical gear 28 and the fixed gear 33 form a set of gear transmission mechanism, and the fixed gear itself does not rotate. When the second synchronous pulley 25 rotates, the first cylindrical gear 28 makes a planetary motion around the fixed gear 33 and drives the second bevel gear 32 to rotate through the transmission shaft. The first bevel gear 31 and the second bevel gear 32 form a bevel gear transmission mechanism. The first bevel gear 31 is connected with the second lead screw 30 through a key. The second lead screw 30 and the nut 29 form a lead screw nut mechanism, and the nut 29 is connected with the guide block 26 at the same time, and the guide block 26 is connected with the cutter 20 by bolts. This converts the planetary motion of the first spur gear 28 into a radial feed motion of the cutter 20 .

As shown in Fig. 8 and Fig. 9, the first incomplete gear 19 and the second incomplete gear 38 are connected with the low-speed shaft of the reducer through a one-way bearing. The fourth spur gear 39 forms an internal mesh and an external mesh with the two incomplete gears respectively. It should be noted that the fourth spur gear 39 can only mesh with one of the gears at a time. The two incomplete gears rotate in the same direction at the same time, and when the fourth cylindrical gear 39 undergoes the transformation of internal and external meshing, the change of the rotation direction can be realized. The fourth cylindrical gear 39 transmits power to the third synchronous pulley 36 through the gear set (second cylindrical gear 37, third cylindrical gear 35), and then to the second synchronous pulley 25 through belt transmission, and the second cylindrical gear 37 , the third cylindrical gear 35, the third synchronous pulley 36, the fourth cylindrical gear 39, and the incomplete gear are arranged on the transmission seat 23.

The initial state of the overall pneumatic circuit is: the first cylinder 1 and the second cylinder 5 are in the extended state; the third cylinder 10, the fourth cylinder 13, and the fifth cylinder 14 are in the retracted state. The control system mainly relies on mechanical control valves and pneumatic circuits to achieve sequential control. The pneumatic schematic diagram is shown in Figure 10. First, the hollow cylindrical drug form extruded by the screw extruder in the previous process passes through the first collet 15 and the second collet. The two collets 4 stretch out to the front end of the drug-type bracket, and trigger the two-position two-stop mechanical control valve 53 to switch to the right position. The left end of the second two-position four-way single-air control valve 50 obtains the air pressure signal and turns to the left position to work to control the shrinkage and clamping of the first cylinder 1 and the second cylinder 5 piston rods. The first two-two-three normally-off machine control valve 49 is triggered during the contraction process of the first cylinder 1 and the second cylinder 5, and is switched to an on state. The first two-two three-way machine control valve 49 controls the first two-two four-way single air control valve 45 to turn to the right position, and the air motor 48 reversely rotates. The air motor 48 transmits the power to the steering mechanism and the cutter mechanism through the double output shaft reducer to complete the fixed-length cutting operation of the medicine type. During the forward movement of the carriage trolley, the iron stopper fixed on it triggers the second two-position three-way normally-off machine control valve 52 and the third two-position three-way normal-off machine control valve 54 in turn, and the triggering time is determined by the length of the iron stopper. control. By debugging, the second two-two-three normal-off machine control valve 52 is placed in the position where the carriage dolly is located when the medicine type cut-off is completed. After the drug type is cut off, the second two-two three-way machine control valve 52 is triggered by the stopper, and the fifth cylinder 14 falls to completely separate the cut-off drug type. After the medicine type separation is completed, the third two-two three-way normally-off machine control valve 54 is triggered, the fourth two-two four-way single air control valve 55 is converted to the right position, and the piston rod of the third cylinder 10 is stretched out. The medicine type cut off above the medicine type carriage is driven by the third air cylinder 10 to move a certain distance in the axial direction. The fourth two-two three-way machine-controlled valve 56 is triggered when the third cylinder 10 is located at the maximum stroke of the left end, and the fifth two-two four-way single air control valve 57 is converted to the left position. The 4th cylinder 13 piston rods stretch out, and the medicine-shaped finished product is pushed out the medicine-shaped carriage. At this time, the two-position, two-position, normally-off mechanical control valve 53 is reset by the spring; the first cylinder 1 and the second cylinder 5 are released, and the first two-position, three-position, normal-off mechanical control valve 49 is reset; the air motor 48 is reversed, and the carriage trolley return. So far, once the cutting operation is completed, the overall device resets and waits for the next cycle.

Claims (1)

1. a kind of online ring type shearing device, it is characterised in that including pedestal（8）, travelling carriage dolly（7）, preceding chuck mechanism, after Chuck mechanism, cutter mechanism, movable support bracket and steering mechanism；

Travelling carriage dolly（7）It is arranged on pedestal, travelling carriage dolly（7）Pass through wheel（21）Slided on pedestal, preceding chuck machine Structure, rear chuck mechanism are arranged on travelling carriage dolly（7）On, preceding chuck mechanism includes being fixed on travelling carriage dolly（7）On first Collet support, the first collet support are provided with the first chuck（34）, the first chuck（34）Inside it is horizontally installed with first Collet（15）, the first collet（15）Tail end and the first shift fork（2）Upper contact, the first chuck（34）Outer fixation There is the first cylinder（1）, the first cylinder（1）Piston rod and the first shift fork（2）Bottom connects, the first shift fork（2）Middle part be hinged On the first collet support；

Chuck mechanism includes being fixed on travelling carriage dolly afterwards（7）On second spring chuck support, on second spring chuck support Provided with the second chuck, second spring chuck is horizontally installed with the second chuck（4）, second spring chuck（4）Tail end and second Shift fork（6）Upper contact, be fixed with the second cylinder outside the second chuck（5）, the second cylinder（5）Piston rod and the second shift fork （6）Bottom connects, the second shift fork（6）Middle part be hinged on second spring chuck support；

Cutter mechanism includes being arranged on the second synchronous pulley（25）On power transmission shaft, one end of power transmission shaft and the first roller gear （28）Connection, the first roller gear（28）And fixed gear（33）Engagement, the other end and second bevel gear of power transmission shaft（32）Even Connect, second bevel gear（32）And first bevel gear（31）Engagement, first bevel gear（31）It is arranged on the second leading screw（30）On, second Leading screw（30）On nut（29）With cutting knife（20）Connection；

Steering mechanism includes the second synchronous pulley（25）, the second synchronous pulley（25）It is arranged on the first chuck（34）It is upper and with fixation Gear（33）Coaxially, the second synchronous pulley（25）On be connected with the first timing belt（16）, the first timing belt（16）It is also same with the 3rd Walk belt wheel（36）Connection, the 3rd synchronous pulley（36）With the second roller gear（35）It is coaxially connected, the second roller gear（35）With 3rd roller gear（37）Engagement, the 3rd roller gear（37）With the 4th roller gear（39）It is coaxially connected, the 4th roller gear （39）With the first partial gear（19）, the second partial gear（38）Internal messing and external toothing are formed respectively, and first is incomplete Gear（19）With the second partial gear（38）Pass through the first output axis connection of unilateral bearing and decelerator；

Movable support bracket includes being fixed on travelling carriage dolly by support（7）3rd cylinder of front end（10）, also set up on the support There is the first guide pillar（11）, the 3rd cylinder（10）Piston rod with can be along the first guide pillar（11）The bracket of slip（12）Connection, bracket （12）On be further fixed on the 4th cylinder（13）With the 5th cylinder（14）, the 4th cylinder（13）Piston rod tilt upward aligning bracket （12）, the 5th cylinder（14）Piston rod face bracket straight down（12）, bracket（12）Front end be additionally provided with travel switch；

Pedestal（8）On be further fixed on two the first leading screws be arrangeding in parallel（9）, the first leading screw（9）On nut by connecting rod with Travelling carriage dolly（7）Connection, the first leading screw（9）End set has the first synchronous pulley（22）, two first synchronous pulleys（22）It is logical Cross the second timing belt（24）Connection a, wherein synchronous pulley（22）Axis connection is exported with the second of decelerator.